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NAEP Technical DocumentationSchool Response Rates for the 2009 Private School National Assessment

The following table presents counts of eligible sampled schools and participating schools, as well as weighted school response rates, for the private school samples in which the mathematics, reading, and science operational assessments were conducted. The weighted school response rates estimate the proportion of the student population that is represented by the participating school sample prior to substitution.

NAEP mathematics, reading, and science operational study response rates for sampled schools, by grade and school type: 2009

Grade and private school type	Eligible sampled schools	Participating schools, including substitutes	Weighted school response rate prior to substitution (percent)
NOTE: School counts are rounded to the nearest ten.  Detail may not sum to total due to rounding. Percentages are based on unrounded counts. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2009 Assessment.
Fourth grade
All private	440	370	72.70
Catholic	170	160	87.68
Non-Catholic private	270	210	58.66
Eighth grade
All private	450	370	72.05
Catholic	160	150	86.44
Non-Catholic private	290	220	57.98
Twelfth grade
All private	260	180	52.29
Catholic	30	30	59.62
Non-Catholic private	220	150	43.73

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